package com.itheima.reggie.controller;

import com.alibaba.druid.util.StringUtils;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.itheima.reggie.common.R;
import com.itheima.reggie.entity.Employee;
import com.itheima.reggie.service.EmployeeService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.util.DigestUtils;
import org.springframework.web.bind.annotation.*;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import java.nio.charset.StandardCharsets;
import java.time.LocalDateTime;

@Slf4j
@RestController
@RequestMapping("/employee")
public class EmployeeController {

    @Autowired
    private EmployeeService employeeService;

    /**
     * 登录
     * @param session 登录成功之后，储存用户登录信息
     * @param employee 接收页面发送的用户信息
     * @return
     */
    /*@PostMapping("/login")
    public R<Employee> login(HttpServletRequest request, @RequestBody Employee employee){
        //1.将页面提交的密码password进行md5加密处理
        String password = employee.getPassword();
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        //2.根据页面提交的用户名username查询数据库
        LambdaQueryWrapper<Employee> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(Employee::getUsername,employee.getUsername());
        Employee emp = employeeService.getOne(queryWrapper);
        //3.如果没有查询到则返回登录失败结果
        if(emp == null){
            return R.error("该用户不存在,登陆失败");
        }
        //4.密码对比，如果不一致则返回登陆失败结果
        if (!emp.getPassword().equals(password)){
            return R.error("登录失败，请检查用户名和密码");
        }
        //5.查看员工状态，如果为已禁用状态，则返回员工已禁用结果
        if(emp.getStatus() == 0){
            return R.error("该账号已禁用");
        }
        //6.登录成功，将员工id存入Session并返回登录成功结果
        request.getSession().setAttribute("employee",emp.getId());
        return R.success(emp);
    }*/
    @PostMapping("/login")
    public R<Employee> login(HttpSession session, @RequestBody Employee employee){

        //1.将页面提交的密码password进行md5加密处理
        String password = employee.getPassword();//明文密码
        password = DigestUtils.md5DigestAsHex(password.getBytes());//密文

        //2.根据页面提交的用户名和密码查询数据库
        LambdaQueryWrapper<Employee> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(Employee::getUsername,employee.getUsername());
        queryWrapper.eq(Employee::getPassword,password);
        Employee emp = employeeService.getOne(queryWrapper);

        //3.判断用户是否存在
        if(emp == null){
            return R.error("该用户名或密码错误");
        }

        //4.判断用户状态
        if(emp.getStatus() == 0){
            return R.error("该账号已禁用");
        }

        //5.登录成功，将员工id存入Session并返回登录成功结果
        session.setAttribute("employee",emp.getId());
        return R.success(emp);
    }

    /**
     * 员工退出
     * @param session
     * @return
     */
    /*    @PostMapping("/logout")
    public R<String> logout(HttpServletRequest request){
        //清理Session中保存的当前登录员工的id
        request.getSession().removeAttribute("employee");
        return R.success("退出成功");
    }*/
    @PostMapping("/logout")
    public R<String> logout(HttpSession session){
        //清理Session中保存的当前登录员工的id
        session.removeAttribute("employee");
        return R.success("退出成功");
    }

    /**
     * 新增员工
     * @param session
     * @param employee
     * @return
     */
    @PostMapping
    public R<String> save(HttpSession session,@RequestBody Employee employee){
        log.info("新增员工，员工信息: {}",employee.toString());

        //设置初始密码是123456，需要进行md5加密处理
        employee.setPassword(DigestUtils.md5DigestAsHex("123456".getBytes()));

        /*employee.setCreateTime(LocalDateTime.now());
        employee.setUpdateTime(LocalDateTime.now());

        //获得当前登录用户的id
        Long empId = (Long) session.getAttribute("employee");

        employee.setCreateUser(empId);
        employee.setUpdateUser(empId);*/

        employeeService.save(employee);
        return R.success("新增员工成功");
    }

    /**
     * 员工信息分页查询
     * @param page
     * @param pageSize
     * @param name
     * @return
     */
    @GetMapping("/page")
    public R<Page> page (int page,int pageSize,String name){

        log.info("page = {},pageSize = {},name = {}",page,pageSize,name);

        //构造分页构造器
        Page pageInfo = new Page<>(page, pageSize);
        //构造分页条件构造器
        LambdaQueryWrapper<Employee> lqw = new LambdaQueryWrapper<>();

        //添加过滤条件
        lqw.like(name != null,Employee::getName,name);
        //添加排序条件
        lqw.orderByDesc(Employee::getUpdateTime);

        //执行查询
        employeeService.page(pageInfo,lqw);
        return R.success(pageInfo);


    }

    /**
     * 根据id修改员工信息
     * @param session
     * @param employee
     * @return
     */
    @PutMapping
    public R<String> update(HttpSession session,@RequestBody Employee employee){
        log.info("employee",employee);

        //查看线程id
        long id = Thread.currentThread().getId();
        log.info("线程id为: {}",id);

       /* //获得当前登录用户的id
        employee.setUpdateUser(empId);
        employee.setUpdateTime(LocalDateTime.now());*/

       // Long empId = (Long) session.getAttribute("employee");
        employeeService.updateById(employee);
        return R.success("修改成功");
    }

    /**
     * 根据id查询员工信息
     * @param id
     * @return
     */
    @GetMapping("/{id}")
    public R<Employee> getById(@PathVariable Long id){
        log.info("根据id查询员工信息!!!");

        Employee employee = employeeService.getById(id);
        if (employee != null){
            return R.success(employee);
        }
        return R.error("没有查询到对应员工信息");
    }
}
